Scraper for disk seed-drills.



No. 718,885. PATENTED JAN. 20, 1903.

I W. STEPHENSON.

SGRAPER FOR DISK SEED DRILLS.

APPL IOATION FILED MAY 24, 1902.

30 MODEL.

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WILLIAM STEPHENSON, OF ST. LOUIS PARK, MINNESOTA.

SCRAPER FOR DISK SEED -DRILLS.

SPECIFICATION forming part of Letters Patent No. 718,885, dated January20, 1903.

Application filed May 24,1902. Serial No. 108,779. (No model.)

T0 in whom it may concern:

Be it known that I, WILLIAM STEPHENSON, a citizen of the Dominion ofCanada, residing at St. Louis Park, county of I-Iennepin, State ofMinnesota, have invented certain new and useful Improvements in Scrapersfor Disk Seed-Drills, of which the followingis a specification.

My invention relates to disk seed-drills, and particularly to thecleaning or scraping plates therefor, and is designed as an improvementover similar devices of this kind shown and described in Letters Patentof the United States Nos. 624,117, 624:,118, and 624,119, issued to meMay 2, 1899.

In the operation of a disk seed-drill in wet weather or in heavy stickysoil it has been found necessary to provide scraper devices for keepingthe surfaces of the disks near their circumferencesclear of the mud andother sticky substances that cling thereto in order that the edges ofthe disks will enter the ground the proper distance for seeding, all ofwhich has been heretofore fully described in Letters Patent abovereferred to. The scraper devices which I employ consist, preferably, ofsteel plates having sharpened beveled edges which bear upon the surfacesof the disks at an angle thereto and keep them clean and bright. Itsometimes happens, however,that where a machine has stood out of doorsin wet weather and the surfaces of the disks have become rusted or is inuse in a soil of a peculiarly sticky nature a thin coating of dirt willcollect on the disks and the beveled edges of the scrapers will belifted thereby 0d the surfaces of the disks and allow them to revolveWithout being thoroughly cleaned. At such times I have found itdesirable to reverse the position of the scrapers on their pivots, sothat the straight edges thereof will bear upon the disks and digginginto the thin sticky coating formed thereon effectually remove the same.

In the scrapers as heretofore constructed I have arranged the eyes orsockets wherein the pivots are inserted on one side of the plate,preferably next to the disks, and adjusted the tension-springsaccordingly; but I have found that when the scrapers were re versed withthe eyes on the opposite or outside the angle of the plates with respectto the disks would be changed and also the tension of the springs,necessitating the readjustment of the springs and the angle of theplates with respect to the disks, or to avoid changing the tension ofthe springs the removal of the plates from the casting wherein they aresupported and readjnsting them to bring their beveled edges to theoutside.

The object, therefore, of my present invention is to obviate thenecessity of removing the scraperplates from their castings or holdersand also to provide for the same tension of the springs and the sameangle of the plates with respect to the disks whether the plates arearranged with their beveled edges bearing on the disks or reversed.

A further object of the invention is to provide means for preventing thescraper-plates from becoming accidentally disengaged from their pivots.

The invention consists generally in providing a scraper holder or headhaving a socket or eye with respect to which the scraper-plate iscentrally arranged.

Further, the invention consists in arranging the socket on the end ofthe plate at one side of the center.

Further, the invention consists in providing an arm or lever having aflange on one side to engage a stopon the scraper-holder and prevent theaccidental disengagement of lever from the holder when the parts are intheir working position, said lever having a flat face opposite saidflange to permit the disengagement of the scraper-holder from the leverwhen the parts are revolved to a certain predetermined point.

Further, the invention consists in various constructions andcombinations, all as hereinafter described, and particularly pointed outin the claims.

In the accompanying drawings, forming part of this specification, Figurel is a side elevation of a seeder-disk with my invention appliedthereto. a Fig. 2 is a rear view of the same. Fig. 3 is a plan view ofone of the scraper-blades and its lever. Fig. 4 is an edge view of thesame. Fig. 5 is a section looking toward the right on the line a: a: of

' axle and provided with the central scraper 6, correspondingsubstantially to the one described and claimed in my patents abovereferred to.

7 is the rear bracket-frame connecting the upper part of the oil-conduitwith the lower part thereof, and 8 the usual presswheel arms.

9 represents the scraper-levers having studs 10, that are adapted to fitloosely in sockets 11 on the grain-spout casting, and these levers arepreferably provided with lugs 12, which when the levers are swung aroundto their operative position slip under flanges or projections 13 on thesaid casting and prevent the lever-studs from becoming accidentallydisengaged from their sockets. The levers are arranged substantially asshown in Fig. 1, with their upper ends connected by the spring 14, whichtends to hold said ends apart, while the opposite ends are pressedtoward each other to hold the scraper-plates upon the surfaces of thedisks with a yielding pressure.

14 represents the scraper-holders having converging grooves 15 toreceive the scraperplates 16, as heretofore described in my formerpatents.

The plates are preferably tapered,as shown, and have beveled edges 17,which bear upon the surfaces of the disks and clean olf the mud andother sticky material that may cling thereto as the disks revolve. Thescraperplates 16 are provided with recesses 16' in one end to receivesockets or eyes 18, provided on the scraper-holders and with respect towhich the plates are centrally arranged. In other words, the centers ofthe sockets are substantially parallel with the longitudinal axes of thescrapers, and these sockets are swiveled on studs 20, provided on theends of the levers 9, which have flanges 21 to engage stops 22 on thescraper-holders and prevent the disengagement of the scrapers from theirlevers when in their working position. The flanges on one side are cutaway,forming flat surfaces 23, and by revolving the scraper-holders sothat the stops will be opposite said flat surfaces the scrapers, withtheir holders, may be easily disengaged'from the levers and turned tobring either the beveled or straight edges of the scrapers to bear uponthe disks. The swiveled connection of the scraper-plates will allow themto adjust themselves automatically to the surfaces of the disks andaccommodate themselves to anyinequalities thereon, While the springswill hold the edges of said plates against the surfaces of the disks andeffectually clean off whatever material may cling thereto.

Whenever it is desired to apply the straight edge of the scraper-bladesto the disks, they can be readily detached from their levers bypartially revolving them and reversing-their position without changingtheir angle with respect to the disks or altering the tension of thesprings.

As shown in the drawings, I have arranged the scraper-holder sockets atone side of the center of the plates to cause the inner ends of theirbeveled edges (which bear upon annular sections of the disks that moveslower than the sections the outer ends bear upon, and hence do not wearas rapidly) to be held with greater pressure on the disks to equalizethe wear of the ends of the plates.

I claim as my invention 1. In a disk seed-drill, the combination,with agrain-spout, of the revolving disks, scraperplates adapted to bear uponthe surfaces of said disks at an angle thereto and having sockets oreyes, pivoted spring-actuated levers having ends that are swiveled insaid sockets, and the centers of said sockets being in linesubstantially with the plane of said plates to permit reversal of saidplates without changing the tension of the lever-springs or the angle ofthe plates on said disks, for the purpose specified.

2. In adisk seed-drill, the combination,with a grain-spout, of therevolving disks, scraperholders having sockets, spring-actuated leverspivoted on said spout and having ends that are swiveled in said sockets,plates removably mounted in said holders, the planes of said plates andthe centers of said sockets being substantially in line whereby thereversal of said plates is permitted without changing the tension of thelever-springs or the angle of the plates on their disks.

3. In a disk seed-drill, a scraper device comprising a holder having asocket, a springpressed pivoted lever having an end that is swiveled insaid socket, and a plate carried by said holder with its plane in linesubstantially with the center of said socket, substantially as describedand for the purpose speci- 4. In a disk seed-drill, a scraper devicecomprising a scraper-plate, a scraper-holder having a socket at one sideof the center of said plate, and a spring pressed pivoted lever whereonsaid socket is swiveled, the side edge of said plate that is fartherfrom the center of said socket being nearer the edge of the disk thanthe opposite side edge of said plate, for the purpose specified.

5. In a disk seed-drill, a scraper device,comprising a scraper-platehaving a socket with its center substantially in line with the plane ofsaid plate and on one side of the center thereof, and a spring-pressedpivoted lever having a stud whereon said socket is swiveled, the sideedge of said plate that is farther from the center of said socket beingnearer the edge of its disk than the other edge of said plate, for thepurpose specified.

receive the end of said lever and a 111g cooperating with said flange tolock said holder 15 on said lever when in a working position, and topermit its removal therefrom when in a non-Working position, and ascraper-plate carried by said holder.

In Witness whereof I have hereunto set my 20 hand this 12th day of May,1902.

WVILLIAM STEPHENSON.

In presence of- RICHARD PAUL, M. O. NOONAN.

